Wave Function Renormalization Effects in Resonantly Enhanced Tunneling
arXiv:1201.6286 · doi:10.1103/PhysRevA.85.053602
Abstract
We study the time evolution of ultra-cold atoms in an accelerated optical lattice. For a Bose- Einstein condensate with a narrow quasi-momentum distribution in a shallow optical lattice the decay of the survival probability in the ground band has a step-like structure. In this regime we establish a connection between the wave function renormalization parameter Z introduced in [Phys. Rev. Lett. 86, 2699 (2001)] to characterize non-exponential decay and the phenomenon of resonantly enhanced tunneling, where the decay rate is peaked for particular values of the lattice depth and the accelerating force.
12 pages
References in corpus (8)
- Many-Body Physics with Ultracold Gases
- Nonlinearity induced destruction of resonant tunneling in the Wannier-Stark problem
- Resonant tunneling of Bose-Einstein condensates in optical lattices
- Time-resolved measurement of Landau--Zener tunneling in different bases
- Bose-Einstein condensates in accelerated double-periodic optical lattices: Coupling and Crossing of resonances
- Nonlinear resonant tunneling of Bose-Einstein condensates in tilted optical lattices
- Engineering of Landau-Zener tunneling
- Engineered quantum tunnelling in extended periodic potentials
Cited by in corpus (10)
- Hidden non-Markovianity in open quantum systems
- Stückelberg interferometry using spin-orbit-coupled cold atoms in an optical lattice
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- Manifold approach for a many-body Wannier-Stark system: localization and chaos in energy space
- Noise assisted transport in the Wannier-Stark system
- Landau-Zener transitions in the presence of harmonic noise
- Manipulating matter waves in an optical superlattice
- Lifetimes of atoms trapped in an optical lattice in proximity of a surface
- Unearthing wave-function renormalization effects in the time evolution of a Bose-Einstein condensate
- Generation of robust entangled states in a non-hermitian periodically driven two-band Bose-Hubbard system